Do your daughter dating older man
If you feel like you're in a situation in which you are expected to do more sexual things that you don't feel comfortable with, this probably isn't the right relationship for you.
If this dude is trying to groom you so that you can keep up with him sexually then this dude blows.
This is known as the age-differential effect, explains psychologist Vinita Mehta in the article "When It Comes To Dating, Do Age Differences Matter? If your daughter is one of many women who are drawn to older men, there may be little you can do about it.
Take a step back and try to see things from your daughter's perspective.
Encourage your daughter to confide in you about her life in general.
Perhaps you divorced her father and she is seeking a father figure in her life.
Or perhaps she is simply more attracted to a more mature man, who can offer her more security than a man her own age.